Storage-battery-cell closure



Patented Oct. 15, 1 929 1,732,158

IBEUCE FOBD, OF PEILADELPEIA, PENNSYLVANIA STOBAGE-BATTERY-CELL CLOSUBE Application filed December 8, 1924. Serial No. 754340.

'My invention relates to closures for storand 13, and are separatedby a suitable sepaage battery cells, and particularly to cells in rator 14. which the element is assembled in a cylindri- The cover 4 is also provided with a vent cal jar. openin 15' of cylindrical shape, partly closed 6 Objects of the invention are to provide a by a .iaphragm 17 at the bottom. This 65 closure of inexpensive design, easy to assemdiaphragm is provided with a, small central u ble, and adapted to atl'ord a tight seal be opening or perforation 16. The diaphragm tween the top of the jar and the cover. Other 17 is divided into four sectors by slits 18, objects of the invention will be a pparent from permitting the filling tube or hydrometer the following description which will be given syringe to be inserted into the cell. It will 60 in connection with one embodiment of my be noted that this diaphragm in its normal invention, and at the end of the description position a most completely closes the cell, th i v nti n ill b laim d thus reducing evaporation of the eleetrolyte In the accompanying drawings to a minimum, but permits a tube of com- Figura 1 i a e tional el vation of a, ll paratvely large diameter to be inserted there- 05 embodying features of the invention and t rough When necessary. v showing a face view of the plates. The terminal posts 10 and 11 are provided Fig. 2 is a sectional elevation taken at right th a reduced section or surrounding groove angles to that of Figure 1, and at the point where they pass through the Fi 3 i t i f th ll v openngs 8 and 9 in the cover, above which I th d i 1 i a tain f s a portion 19 conical in shape and taperlindrical form which may be of an suitable g p rd, permitting the posts to be material, such 'as glass, and whic is pro pushed through the cover from below, formvided at the top with external screw threads g an ic se and to be Supported from 25 2. The upper surface or edge 3 of the onthe cover when in normal position as shown.

tainer is flat, as by grinding, to make a. tight In assembling the cell the plates are asl with th cover 4 Th cover 4 i f a sembled in the cover as described above, the suitable elastic, resilient or yielding material, Separator inserted w e them and the eleu h as oft bb r, d t i vid d on ment thus assembled laced in position on top its under face with a circular groove, adapt- Of the m T e ri g c ar 5 is then ed to receive the upper edge 3 of the con- SCI'eWed In Place d the ssembly is comtainer and to make a tight seal'therewith. pleted.

The cover 4 is held in position and firmly I dalin:

pressed or clamped on the container by means In combmatlol a SOt v- 35 of a rigid collar or ring 5 of hard rubber, lead m mtegm theTPW1th a vent p m g 0f are3 alloy, or other suitable rigid material, which a aPted l' the lnserptlon a fiulng y g has a cylindrical body 6, provided with inand a fiexble daphragm a g a wth ternal screw threads adapted to engage with Cover normally .partly closmg i opnmg the threads 2 atthe top of the container. The f shts to permlt the ringalso includes an inwardly projecting i Sal i led e or flange 7 adapted to fit over the outer n com ma lon a ey mdncal qonta'mcr having an open end and provided with a fiat edge 01 margnal portion of the face of the f T t l cover 4 so that when the rin 5 is screwed upper Sur a fes-1 len -cover C Osmg Sald 45 down it will firmly clamp the c over 4 against S end ovrlymg anlhilv' O' the upper edge of the container 1, thus prol g a ven OPenmD area a &pte Or t e m `sertion of a filling syrin e and havin a ducng a tght seal. The cover 4 s provided fl ibl dia hragm norma ly partly clos ing with two openings 8 and 9 to receive the tersaid opening and provided with slits to mnal posts 10 and 11 of the plates of the mit the insertion of said syringe, and a col- 50 cell. The plates themselves are shown at 12 lar having screw-thread engagement with the container and provided with an nward flange overlying the marginal portion of the cover and pressing the same against said flat upper surface.

5 3. In combination a cyiindrcal container having an open end, a resilient cover closing said open end and having a circular faca l groove eceving the container Wall at the open end, an'd a collar provided With an internal finge overlying the ma ginal por ton of the cover and having screw-thread engagement With the container.

BRUCE FORD. 

